log-basename unpredictable behavior in standalone mode

Hello,
We are trying to unify all our setups/configurations with the help of:

datadir = /var/lib/mysql

log-basename=mariadb

However, we've hit the unpredictable behavior (in 5.5.41) in Standalone mode:

Our syslog configuration:

[mysqld_safe]

syslog

syslog-tag=daemon

Host: MARIADBTEST

The tests we've run on CentOS 6.6:

With Standalone Server [mysqld]:

1. No syslog
mariadb.err
mariadb-slow.log
MARIADBTEST.pid

Result: log-basename doesn't affect pid file name.

2. Adding log_error='' in standalone mode (trying to activate syslog):
mariadb-slow.log
MARIADBTEST.err
MARIADBTEST.pid

Result: no syslog logging is active, and both err and pid files use hostname.

With mysqld_multi [mysqld1]:

1. No syslog
mariadb.err
mariadb.pid
mariadb-slow.log

Result: everything is good!

2. Adding log_error='' (trying to activate syslog):
mariadb.pid
mariadb-slow.log

Result: Everything is good, and error log goes to syslog!

As you see only in mysqld_multi mode the behavior is by design.

Thanks!
Alex